<template>
  <div>
      <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
        <!-- 添加角色按钮 -->
        <el-row>
            <el-col>
                <el-button type="primary">添加角色</el-button>
            </el-col>
        </el-row>

        <!-- 角色列表区域 -->
        <el-table :data="rolelist" border stripe>
            <!-- 展开列 -->
            <el-table-column type="expand">
                <template slot-scope="scope">
                    <el-row :class="['bdbottom',i1 ===0 ? 'bdtop' :'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                        <!-- 渲染一级权限 -->
                        <el-col :span="5">
                            <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                            <i class="el-icon-caret-right"></i>
                        </el-col>
                        
                        <!-- 渲染二级和三级权限 -->
                        <el-col :span="19">
                            <!--通过for循环嵌套2级权限 -->
                            <el-row :class="[i2 ===0 ? '':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                                <el-col :span="6">
                                    <el-tag closable type="success" @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                                    <i class="el-icon-caret-right"></i>
                                </el-col>
                                <el-col :span="18">
                                    <el-tag @close="removeRightById(scope.row,item3.id)" closable type="warning" v-for="(item3) in item2.children" :key="item3.id">
                                        {{item3.authName}}
                                    </el-tag>
                                </el-col>
                            </el-row>
                        </el-col>
                    </el-row>
                    <!-- <pre>
                        {{scope.row}}
                    </pre> -->
                </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="角色名称" prop="roleName"></el-table-column>
            <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
            <el-table-column label="操作" width="300px">
                <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
                        <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">权限分配</el-button>
                </template>
            </el-table-column>
                      
        </el-table>
    </el-card>

    <!-- 分配权限对话框 -->
    <el-dialog
        title="分配权限"
        :visible.sync="setRightDialogVisible"
        width="50%"
        @close="setRightDialogClosed"
        >
        <!-- 树形控件 -->
        <el-tree ref="treeRef" :default-checked-keys="defKeys" default-expand-all node-key="id" show-checkbox :data="rightslist" :props="treeProps"></el-tree>
        <span slot="footer" class="dialog-footer">
            <el-button @click="setRightDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="allotRights">确 定</el-button>
        </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
        // 所以角色列表数据
        rolelist:[],
        //控制分配权限对话框显示
        setRightDialogVisible: false,
        rightslist:[],
        //树形控件的绑定对象
        treeProps:{
            label:'authName',
            children:'children'
        },
        //默认选中的节点id 
        defKeys:[],
        //即将分配权限的id
        roleId:''
    }
  },
  created(){
      this.getRolesList()
  },
  methods: {
      async getRolesList(){
          const {data: res} = await this.$http.get('roles')
          if(res.meta.status !==200){
              return this.$message.error('获取角色失败')
          }
          this.rolelist  = res.data
      },
      //删除tag标签
      async removeRightById( role,rightId){
          //弹框提示是否删除
          const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
        if(confirmResult !=='confirm'){
            return this.$message.info('取消删除')
        }
        const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        console.log('删除了')
        if(res.meta.status !==200){
            return this.$message.info('删除权限失败')
        }
        // this.getRolesList()
        role.children = res.data
      },
      //展示分配权限对话框
      async showSetRightDialog(role){
          this.roleId = role.id
          //获取所有权限列表
          const {data:res} = await this.$http.get('rights/tree')
          if(res.meta.status !== 200){
              return $message.error('获取数据失败')
          }
          //获取到的权限数据保存到data中
          this.rightslist  = res.data
          //递归获取三级节点id
          this.getLeafKeys(role,this.defKeys)
          this.setRightDialogVisible = true
      },
      //通过递归，获取角色下所有三级权限id，并保存到defkeys数组
      getLeafKeys(node,arr){
          //如果当前节点不包含children属性，则是三级属性
          if(!node.children){
              return arr.push(node.id)
          }  

          node.children.forEach(item =>this.getLeafKeys(item,arr))
      },
      //监听对话框的关闭事件
      setRightDialogClosed(){
          this.defKeys = []
      },
      //点击为角色分配权限
      async allotRights(){
          const keys = [
            ...this.$refs.treeRef.getCheckedKeys(),
            ...this.$refs.treeRef.getHalfCheckedKeys(),
          ]
          const idStr = keys.join(',')

          const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
          if(res.meta.status !=200){
              return this.$message.error("分配权限失败")
          }
          this.$message.success('分配权限成功！')
          this.getRolesList()
          this.setRightDialogVisible = false
      }
  }
}
</script>

<style lang="less" scoped>
.vcenter{
    display: flex;
    align-items: center;
}
</style>
